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https://issues.apache.org/jira/browse/LOG4J2-774?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Frank Wißmann updated LOG4J2-774:
---------------------------------
Attachment: NdcPatternConverter.java.patch
The patch restores the Log4j 1.2.x layout.
An alternative implementation could copy the Commons Lang join() methods into
org.apache.logging.log4j.util.Strings.
> NdcPatternConverter brakes Log4j 1.2.x layout
> ---------------------------------------------
>
> Key: LOG4J2-774
> URL: https://issues.apache.org/jira/browse/LOG4J2-774
> Project: Log4j 2
> Issue Type: Bug
> Components: Layouts
> Affects Versions: 2.0.1
> Reporter: Frank Wißmann
> Priority: Minor
> Labels: patch
> Fix For: 2.0.2
>
> Attachments: NdcPatternConverter.java.patch
>
>
> In Log4j 1.2.17 NdcPatternConverter.format() returns an empty string "" or
> the stack messages separated by space "a b c"
> (NDC.DiagnosticContext.fullMessage).
> The PatternLayout {{\[%20.20x\]}} results in
> {noformat}[ ]{noformat}
> or
> {noformat}[ a b c]{noformat}
> In Log4j 2.0.1 NdcPatternConverter.format() returns an unmodified
> Collection.toString() representation: "\[\]" for an empty collection or the
> collection separated by comma "\[a, b, c\]"
> (DefaultThreadContextStack.toString() and
> MutableThreadContextStack.toString()).
> The PatternLayout {{\[%20.20x\]}} results in
> {noformat}[ []]{noformat}
> or
> {noformat}[ [a, b, c]]{noformat}
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